linux-kernel - RE: [Resend][PATCH V3] trace,x86: add x86 irq vector tracepoints

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Message-ID: <A5ED84D3BB3A384992CBB9C77DEDA4D41384FC7F@USINDEM103.corp.hds.com>
Date:	Wed, 12 Sep 2012 13:37:20 +0000
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	"Thomas Gleixner (tglx@...utronix.de)" <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"rostedt@...dmis.org" <rostedt@...dmis.org>,
	"'mingo@...e.hu' (mingo@...e.hu)" <mingo@...e.hu>,
	"x86@...nel.org" <x86@...nel.org>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	Satoru Moriya <satoru.moriya@....com>
Subject: RE: [Resend][PATCH V3] trace,x86: add x86 irq vector tracepoints

Hi,

I will submit some performance testing result.

Thanks!

Seiji

> -----Original Message-----
> From: H. Peter Anvin [mailto:hpa@...or.com]
> Sent: Wednesday, September 12, 2012 12:18 AM
> To: Seiji Aguchi
> Cc: Thomas Gleixner (tglx@...utronix.de); linux-kernel@...r.kernel.org; rostedt@...dmis.org; 'mingo@...e.hu' (mingo@...e.hu);
> x86@...nel.org; dle-develop@...ts.sourceforge.net; Satoru Moriya
> Subject: Re: [Resend][PATCH V3] trace,x86: add x86 irq vector tracepoints
> 
> On 09/11/2012 05:00 PM, Seiji Aguchi wrote:
> > Thomas,
> >
> > Please review my patch as we talked in Plumbers.
> >
> 
> Is there any measurable latency added here?  These are some of the most
> performance- (or at least latency-)critical paths in the kernel.
> 
> 	-hpa
> 
> --
> H. Peter Anvin, Intel Open Source Technology Center I work for Intel.  I don't speak on their behalf.